I was hiking down river, crossed one creek & diverted around another & the twisted mangled mess of trees by the river's edge was too much & decided to head back & stumbled on this fellow I was trying to get back to where I know there is a 100 nest Great Blue Heron rookery .... never got there. I had the Sigmonster with a 2x converter attached & was surprised I was able to set the tripod up & find him .... having the flexiblility of zooming back to 600mm helps find the subject ... especially when I am shooting through lots of trees, twigs & brush. I was also able to shoot some great video too .... BUT ..... I am right now using my very limited laptop because my main system motherboard died 3 days ago So, my color & processing is very sub par on this one .... let me know how I did I just had to see if I could do this from my laptop ..... also had to update my CS3 to CS5 ..... haven't had the need for a while Cheers
7D, Sigmonster, 2xII @1294mm, ISO 1250, 1/400s

Had my 30D's front focusing af problem sorted by canon uk at the end of last year. Then had sigma calibrate my HSM 100-300 F4 to the body as the af was still off on that and now it works a lot better (as long as I shoot from f5.6 up as it still front focuses at F4 - there seems to be a focus shift from F4 to F5.6 with this lens ).... Managed to get a sequence of shots of the osprey diving into the water and coming out with a pike but only had the 55-250 IS with me rather than the sigma, this was taken at the RSPB site Loch of Kinnordy in Scotland:

and had a treecreeper happily searching for food right next to a footpath at the RSPB reserve Minsmere in Norfolk UK:

Nice shots of the bullfinch. They used to come to our garden quite regularly a few years ago and would even bring their young, but for the last couple of years I don't think any have come in, which is a real shame because as you've shown they are beautiful birds.
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Walt

I shot this in on a private conservency in Kenya. The night before one of these visited us at our tent at 2:00 A.M. It was shot with a 40D and 70 200F4IS at F7.1,ISO400,1/800, 100mm, in A1 Servo. I added a touch of HDR to pop out the sky. Bernie G